User:Decollete/Least missions to complete prophecies

From Droknar's Forge, head east. Enter the Ice Caves of Sorrow

You can enter the Iron Mines of Moladune mission to infuse your armor (it'll make the Mursaat much easier to deal with), though you won't have to complete it. Infusion occurs about halfway( 15-20 mins) through. And while there are other places you can get infused, this is by far the easiest and its on the way.

Continue east from there. The next 4 missions have to be completed and completing one will unlock the next. Thunderhead Keep Ring of Fire Abaddon's Mouth Hell's Precipice

Reference: [1]